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Topic Review (Newest First)
05-08-2015 11:30 PM
FFhb13 After the flex pipe, as close as possible...you'd have to take it to a shop...make sure you get a quote first so they don't tear your ******* out.
05-08-2015 09:20 AM
Toadster That OBX header doesn't have a CAT but would there be enough room to put a CAT someplace after it?
05-08-2015 07:18 AM
sailor Main CAT is part of the stock header.

Unless you use something like the Magnaflow replacement that also includes a CAT a performance header doesn't include a CAT. Tubing length before the collector precludes space for a CAT in a high performance header (needs to be past the collector, and by then you're at the existing exhaust).

Some versions (PZEV) include a secondary unmetered CAT in the exh. system, the OP didn't mention that. He used a "cheater" system for the second O2 sensor, locating it away from the exh. with a pipe elbow.
05-08-2015 02:43 AM
dbsimms63
Quote:
Originally Posted by Deesiel678 View Post
OBX-HAB261S

I've only seen them for sale on eBay though, not through the OBX website.
It says it is a "cat delete header". I thought he used his cat?
05-08-2015 02:35 AM
Deesiel678
Quote:
Originally Posted by dbsimms63 View Post
Do you have a part number for the headers? I couldn't find them on the OBX site.
OBX-HAB261S

I've only seen them for sale on eBay though, not through the OBX website.
05-08-2015 12:00 AM
dbsimms63
Quote:
Originally Posted by SPRAYPAINT View Post
This post is for informational use. If you plan to install a header here are some things I have ran across and may help when getting all the parts together before your install. I have the OBX Maximizer (1 7/8" runners and 2.5" collector) header installed on my 2012 sedan. Originally I had the upstream air fuel ratio sensor installed about 3" away from the head on only #4 cylinder and the downstream was in the collector. After about 100 miles the CEL came on with P0420 cat code and the engine is running VERY rich. After doing research and talking to my techs that work for me the upstream needs to read all 4 cylinders. I started looking for o2 extenders and could not find one for our cars. I found out that our upstream sensors are a 5 wire wide band air fuel ratio sensor and the wires CANNOT be extended doe to too much resistance. After looking around and being on the phone with my vendors I have found that there is a sensor that will work. It is used on the 2007 Porsche Boxter with the 2.7l. Bosch part #17276, Denso part #234-5108, Walker part #250-25015. These sensors are 850mm (about 33.4") and will reach down to the collector with ease. Now for the downstream sensor. It CAN be extended because it is only used to read the cat efficiency. You will need to use a spacer that comes out in a 90 degree for space and to trick the computer. the rear o2 sensor needs to be at least 2.5" or more behind the upstream sensor. I hope this helps.
Do you have a part number for the headers? I couldn't find them on the OBX site.
04-29-2015 08:40 AM
mk3-hershay
Quote:
Originally Posted by twinbiker11 View Post
Okay people. Planning on ordering the obx header for my focus. What do i need exactly in order for it to work. I have toms sct tune already in the car so that will get rid of the secondary O2 problem
Did you get it order/installed yet?
12-26-2014 02:21 AM
HuskyFocusSP Guys i am wanting to order the OBX header as well. I already have 2.5" from cat back with Stoffler rear twin system. I have injected tune so am wondering what I would need to not have CEL issues.
12-26-2014 02:03 AM
twinbiker11 Okay people. Planning on ordering the obx header for my focus. What do i need exactly in order for it to work. I have toms sct tune already in the car so that will get rid of the secondary O2 problem
01-31-2013 03:33 PM
wantz12
Quote:
Originally Posted by FocusBoy58 View Post
Same Issue I had. Next time I get my car on the lift I will take a picture of the Fix.

Also.. Am I the most WHP Ti-VCT out there still? DYNO People!
How's the DCT handling the extra power? I'd love to have a little extra "go" in mine!
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